Flight
Seattle-Tacoma International Airport (SeaTac) is the major airport for Seattle, but if you're flying in from somewhere closer, Paine Field up in Everett is worth checking out for flights. It's smaller, newer (maybe nicer according to some), and just about as far away from Seattle proper as SeaTac.
Travel Note
Our venue has about 100 parking spots, so if you're driving parking shouldn't be an issue. Seattle has lots of Ubers and Lyfts as well if that's more you speed. If you're a public transit fan, the venue is just over a mile away from the University of Washington light rail station, you could walk or even hop on one of the many lime scooters near the station.